Polymer electrolyte composition, electrolyte membrane, membrane-electrode assembly and fuel cell

Patent metadata

Field	Value
Publication number	US-9614242-B2
Application number	US-201314127703-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 16, 2012
Publication date	Apr 4, 2017
Grant date	Apr 4, 2017

Abstract

Provided are a polymer electrolyte composition, an electrolyte membrane, a membrane electrolyte assembly, and a fuel cell. The polymer electrolyte composition according to an exemplary embodiment of this application includes a first solvent, a second solvent which is different from the first solvent, and a polymer which is reacted with the first solvent and the second solvent, in which the polymer includes a functional group which reacts with the first solvent by a first reaction energy and with the second solvent by a second reaction energy, and the second reaction energy is smaller than the first reaction energy.

First claim

What is claimed is:

1. An electrolyte composition comprising:
a polymer comprising a block-type copolymer,
the block-type copolymer comprising a hydrophilic block and a hydrophobic block, the hydrophilic block comprising a sulfonic acid group;
a first solvent;
a second solvent, wherein the second solvent is water;
wherein the electrolyte composition further comprises a sulfonic acid-water complex formed by reacting the second solvent with the hydrophilic block sulfonic acid group, the complex having a higher solubility than the hydrophobic block with respect to the first solvent, and
wherein the block-type copolymer comprises a repeating unit represented by the following Formula 1 and a repeating unit represented by the following Formula 2:

in Formula 1, a and a′ each separately is an integer larger than 0 and a:a′ is 1,000:1 to 5:1, and
m is an integer from 1 to 10,000, and
in Formulas 1 and 2, A, C, and V are the same as or different from each other, and each independently represented by one of the following Formulas 1-1 to 1-3,

in Formulas 1-1 to 1-3,
X 1 is a direct link, or one of —C(Z 1 )(Z 2 )—, —CO—, —O—, —S—, —SO 2 —, and —Si(Z 1 )(Z 2 )—,
Z 1 and Z 2 are the same as or different from each other, and are each independently one of hydrogen, an alkyl group, a trifluoromethyl group (—CF 3 ), and a phenyl group,
S 1 and S 2 are the same as or different from each other, and are each independently hydrogen; deuterium; a halogen group; a cyano group; a nitrile group; a nitro group; a hydroxyl group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted boron group; a substituted or unsubstituted amine group; a substituted or unsubstituted alkylamine group; a substituted or unsubstituted aralkylamine group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted heteroarylamine group; a substituted or unsubstituted aryl group; a substituted or unsubstituted fluorenyl group; or a substituted or unsubstituted carbazole group,
b and c are the same as or different from each other, and are each independently an integer of 0 to 4,
S 3 to S 6 are the same as or different from each other, and are each independently hydrogen; deuterium; a halogen group; a cyano group; a nitrile group; a nitro group; a hydroxyl group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted boron group; a substituted or unsubstituted amine group; a substituted or unsubstituted alkylamine group; a substituted or unsubstituted aralkylamine group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted heteroarylamine group; a substituted or unsubstituted aryl group; a substituted or unsubstituted fluorenyl group; or a substituted or unsubstituted carbazole group,
d, e, f, and g are the same as or different from each other, and are each independently an integer of 0 to 4,
S 7 to S 10 are the same as or different from each other, and are each independently hydrogen; deuterium; a halogen group; a cyano group; a nitrile group; a nitro group; a hydroxyl group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted boron group; a substituted or unsubstituted amine group; a substituted or unsubstituted alkylamine group; a substituted or unsubstituted aralkylamine group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted heteroarylamine group; a substituted or unsubstituted aryl group; a substituted or unsubstituted fluorenyl group; or a substituted or unsubstituted carbazole group, and
h, i, j, and k are the same as or different from each other, and are each independently an integer of 0 to 4,
in Formula 2,
z and z′ are an integer larger than 0 and z:z′ is 1,000:1 to 5:1,
n is an integer from 1 to 100,000, and
U is represented by one of the following Formulas 2-1 to 2-4,

in Formulas 2-1 to 2-4,
X 2 is a direct link, or —CO— or —SO 2 —,
q and r are the same as or different from each other and are each independently an integer of 0 to 4,
s, t, u, and v are the same as or different from each other and are each independently an integer of 0 to 4,
w and x are the same as or different from each other and are each independently an integer of 0 to 3,
y is an integer of 0 to 4,
T 1 to T 9 are the same as or different from each other, at least one of T 1 to T 9 in Formulas 2-1 to 2-4 is a —SO 3 H or —SO 3 − M + and the other are each independently —SO 3 H, —SO 3 − M + , —COOH, —COO − M + , —PO 3 H 2 , —PO 3 H − M + , or —PO 3 2− 2M + , M is a metallic element, and the others are hydrogen; deuterium; a halogen group; a cyano group; a nitrile group; a nitro group; a hydroxyl group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted boron group; a substituted or unsubstituted amine group; a substituted or unsubstituted alkylamine group; a substituted or unsubstituted aralkylamine group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted heteroarylamine group; a substituted or unsubstituted aryl group; a substituted or unsubstituted fluorenyl group; or a substituted or unsubstituted carbazole group,
in Formulas 1 and 2, B is represented by one of the following Formulas 3-1 to 3-3,

in Formulas 3-1 to 3-3,
X 3 to X 5 are the same as or different from each other and are each independently a direct link, or —CO— or —SO 2 —,
Y 1 is a direct link, or a C 1 to C 60 alkylene group,
E 1 to E 4 are the same as or different from each other, and are each independently hydrogen; deuterium; a halogen group; a cyano group; a nitrile group; a nitro group; a hydroxyl group; a substituted or unsubstituted alkyl group; a substituted or unsubstituted cycloalkyl group; a substituted or unsubstituted alkoxy group; a substituted or unsubstituted alkenyl group; a substituted or unsubstituted silyl group; a substituted or unsubstituted boron group; a substituted or unsubstituted amine group; a substituted or unsubstituted alkylamine group; a substituted or unsubstituted aralkylamine group; a substituted or unsubstituted arylamine group; a substituted or unsubstituted heteroarylamine group; a substituted or unsubstituted aryl group; a substituted or unsubstituted fluorenyl group; or a substituted or unsubstituted carbazole group,
α, β, and ψ are the same as or different from each other and are each independently an integer of 0 to 4,
ε is an integer of 0 to 3,
X 6 is a direct link, or —CO— or —SO—,
Y 2 is a direct link, or a Ci to C 60 alkylene gro

Assignees

• Lg Chemical Ltd

Inventors

• Choi Seong Ho
• Kim Hye Mi
• Cho Hye Sung
• Kim Hyuk
• Choi Youngcheol
• Lee Sangwoo
• Noh Tae Geun
• Sung Kyunga
• Kim Doyoung
• Min Minkyu

Classifications

• C08J5/2256

  based on macromolecular compounds obtained by reactions other than those involving carbon-to-carbon bonds, e.g. obtained by polycondensation · CPC title

• C08J5/2268

  based on macromolecular compounds obtained by reactions involving unsaturated carbon-to-carbon bonds, and by reactions not involving this type of bond · CPC title

• H01M8/103

  having nitrogen, e.g. sulfonated polybenzimidazoles [S-PBI], polybenzimidazoles with phosphoric acid, sulfonated polyamides [S-PA] or sulfonated polyphosphazenes [S-PPh] · CPC title

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• H01M8/1039

  halogenated, e.g. sulfonated polyvinylidene fluorides · CPC title